import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        String n=sc.nextLine();
        int count=0;
        n=n.toUppererCase();
        for(int i=0;i<n.length();i++){
            char c=n.charAt(i);
            if(c=='A'||c=='E'||c=='O'||c=='I'||c=='U'){
                count++;
            }
        }
        if(count>0)
        {
          System.out.println(count) ; 
        }
        else
        {
            System.out.println("-1");
        }
        
    }
}